Superradiant first-order transitions in Dicke models with interacting matter are folds of one equation of state from the matter's magnetization response rather than crossings of disjoint sheets.
Superradiant Solid in Cavity QED Coupled to a Lattice of Rydberg Gas
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abstract
We study an optical cavity coupled to a lattice of Rydberg atoms, which can be represented by a generalized Dicke model. We show that the competition between the atomic interaction and atom-light coupling induces a rich phase diagram. A novel "superradiant solid" (SRS) phase is found, where both the superradiance and crystalline orders coexist. Different from the normal second order superradiance (SR) transition, here both the Solid-1/2 and SRS to SR phase transitions are first order. These results are confirmed by the large scale quantum Monte Carlo simulations.
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cond-mat.str-el 1years
2026 1verdicts
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Folds of one curve: the superradiant phase diagram of Dicke modes with interacting matter
Superradiant first-order transitions in Dicke models with interacting matter are folds of one equation of state from the matter's magnetization response rather than crossings of disjoint sheets.